Which injury can result from prolonged exposure to heat?

Heat exhaustion is a condition that can occur due to prolonged exposure to high temperatures, especially when accompanied by vigorous physical activity. It happens when the body becomes dehydrated and unable to maintain its normal temperature. Symptoms of heat exhaustion include heavy sweating, weakness, dizziness, headache, and nausea. This is a direct consequence of the body's struggle to cool down, leading to a drop in blood flow and a failure to regulate core temperature effectively.

Other options like frostbite typically occur in cold conditions, while cuts and bruises are related to physical trauma rather than temperature exposure. Bites and stings are also unrelated to extreme heat exposure. Therefore, heat exhaustion is the most relevant injury associated with prolonged exposure to heat.